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299. have one’s head in the clouds – have unrealistic dreams, lost in thought.想入非非，心不在焉

注解：字面意思是“把脑袋伸到云彩里”，喻指 "热衷于幻想而脱离实际”，有时也指“心不在焉”。

例句：Even though she is a terrible actress, she thinks someday she will be a movie star. She has got her head in the clouds.

尽管她是一个糟糕的女演员，但是她想着有一天她会成为一个电影明星。她太想入非非了。

300. have one’s heart set on – desire greatly. 渴望，倾心于

注解：set on 是“开始”。字面理解“使某人内心开始”，就是一门心思要开始做某事了。

例句：The boy had his heart set on getting a puppy.

那个男孩渴望有一个宠物。

301. have someone’s number – know what kind of person someone is. 知道某人的底细，看穿某人

注解：number 是名词“数，数量”。字面理解“对某人心中有数”就是看穿某人的意思。

例句：He doesn’t think anyone knows, but I know he stole the material for the book. I’ve got his number.

他以为任何人都不知道，但是我知道他剽窃了书中的材料。我知道他的底细。

302. have something up one’s sleeve – kept secretly ready for the right time. 暗中有应急的计划；另有妙计

例句：If the electricity goes out during the birthday party, don’t worry. I’ve got something up my sleeve.

如果在生日趴的过程中突然断电，不用担心。我另有计划。

303. have the heart to – be thoughtless enough. 有心做…有勇气做…

注解：字面理解“有心去做...”。

例句：I know there was just a death in her family. I don’t have the heart to ask her when she is coming back to work.

我知道她的亲人刚刚去世。我没有勇气问她什么时候回来工作。

304. have two strikes against someone – be in a difficult situation with little chance of success. 某人处于不利处境（很难成功）

注解：strike 是名词“打击，罢工”，也是动词“打，击”。字面理解“给某人两次打击”，源于棒球，如果击球手没有打到球就算是一个strike，连续三个strike击球手就会出局。用于比喻某人成功的机率渺茫。

例句：He wanted the job but he can’t write and he has difficulty speaking on the phone. He’s got two strikes against him already.

他想要这份工作，但是他不怎么会写作也有电话交流障碍。他处于不利境地。

305. haywire – broken, confused, awry. 出了故障，陷于混乱

注解：haywire adj. 乱糟糟的，乱七八糟的；疯狂的。haywire 是由hay 和wire 两个词组成的，指在美国农村用于捆绑干草成卷用的铁丝。这些铁丝因为很细，自带卷而且一次购买的批量大，很容易搞乱成一大坨乱七八糟的的铁丝。

例句：The plan was in place to surprise my boss on his birthday, but it all went haywire.

本来在老板生日聚会上惊讶我的老板的计划已经就位，但是一切都乱了。

306. heart-to-heart – intimate, honest. 坦诚的，交心的

注解：字面理解“心贴心地”，人与人如果能心贴心地交流，就是很坦诚地交流的意思了。

例句： I needed to speak him about a problem I was having. We had a heart-to-heart talk. 我需要跟他说一下我现在面临的一个问题。我们进行了一次坦诚的交谈。

307. high and dry – alone, without help, stranded. 孤立无援；搁浅

注解：这个表达的来源于船有关，有时候船会因为海面的波动而被搁浅在海岸上。船在涨潮时被推到了岸边，不一会，海平面开始波动，潮水退去的时候船就被搁浅了。这个时候，船就被潮水遗弃，就会被“高高地并且干燥地”留在岸边。

例句：After everyone left the party, I was all alone to clean up. I was left high and dry.

在所有人离开了party 之后，我要一个人清理。我有些孤立无援。

308. high and low – every place. 到处

注解：字面理解“高低”。高低上下，包含了整个三维空间。

例句：I can’t seem to find my keys. I’ve looked high and low.

我好像找不到我的钥匙了。我到处都找过了。